All 201 Sedans 1984 to 1993 - Free video on how to remove the rear door panel.
This is a high quality aftermarket part which I believe to be better than the original. And I have not been all that impressed with the original part. Then tend to fail way too often. You will need to remove the door panel to get to this unit. Video included in your account.
201 Right Rear Power Window Regulator
$94.00Sale
$72.00
SKU:
ELT-201RSRR 
Product Details
Fits passenger rear only:
MERCEDES BENZ 190DT
MERCEDES BENZ 190D 2.2
MERCEDES BENZ 190E 2.3
MERCEDES BENZ 190E 2.3-16
MERCEDES BENZ 190D 2.5
MERCEDES BENZ 190E 2.6